Browsing by Author "Zafaruddin, S.M."

Algorithms and performance analysis for self and alien crosstalk mitigation in upstream vectored VDSL

Zafaruddin, S.M. (IIT Delhi, 2012)

Asymptotic performance analysis of zero forcing DSL systems

Zafaruddin, S.M. (IEEE, 2016)

In this paper, we present a novel approximation to the spectral efficiency at the output of a zero-forcing (ZF) receiver in a DSL upstream system. This approximation is extracted by a new asymptotic analysis, where we ...

Asymptotic performance of ZF and MMSE crosstalk cancelers for DSL systems

Zafaruddin, S.M. (Elsevier, 2019-05)

We present asymptotic expressions for user throughput in a multi-user digital subscriber line system (DSL) with a linear decoder, in increasingly large system sizes. This analysis can be seen as a generalization of results ...

Distributed Energy Efficient Channel Allocation

Zafaruddin, S.M. (IEEE, 2019-08)

Design of energy efficient protocols for modern wireless systems has become an important area of research. In this paper, we propose a distributed optimization algorithm for the channel assignment problem for multiple ...

Distributed Learning for Channel Allocation Over a Shared Spectrum

Zafaruddin, S.M. (IEEE, 2019-08)

Channel allocation is the task of assigning channels to users such that some objective (e.g., sum-rate) is maximized. In centralized networks such as cellular networks, this task is carried by the base station (BS) which ...

Diversity Analysis of Multi-Aperture UWOC System over EGG Channel with Pointing Errors

Zafaruddin, S.M. (ARXIV, 2022-12)

Single aperture reception for underwater wireless optical communication (UWOC) is insufficient to deal with oceanic turbulence caused by the combined effect of temperature gradient and air bubbles. This paper analyzes the ...

Dual Sensor Impulse Noise Cancellation for Downstream DSL Systems

Zafaruddin, S.M. (IEEE, 2021-05)

Impulse noise presents a severe performance bottleneck in multicarrier systems. For digital subscriber lines (DSL), the use of a common-mode (CM) sensor is a viable technique to mitigate the impulse noise that couples into ...

Energy Consumption Performance of Opportunistic Device-to-Device Relaying Under Log-Normal Shadowing

Zafaruddin, S.M. (IEEE, 2021-12)

Efficient transmission protocols are required to minimize the energy consumption of mobile devices for ubiquitous connectivity in the next-generation of wireless networks. In this article, we analyze the energy consumption ...

Exact Analysis of RIS-Aided THz Wireless Systems Over α-μ Fading With Pointing Errors

Zafaruddin, S.M. (IEEE, 2021-11)

Reconfigurable intelligent surfaces (RIS) can have an excellent use case for terahertz (THz) wireless transmissions. In this letter, we analyze the performance of a RIS-empowered THz system over the combined effect of α - ...

Exact Performance Analysis of THz Link Under Transceiver Hardware Impairments

Zafaruddin, S.M. (ARXIV, 2023-02)

Transceiver hardware impairment (THI) is inevitable for high-date rate terahertz (THz) communication. Existing statistical analysis either neglects THI's effect or provides approximate results when analyzing the performance ...

Exploiting Common Mode signals for FEXT cancellation in upstream VDSL

Zafaruddin, S.M. (IEEE, 2008)

In this paper, we study the utility of the Common Mode (CM) signal for Far End Crosstalk (FEXT) cancellation in upstream Very high-speed Digital Subscriber Line (VDSL). We begin by extending the stochastic channel model ...

Fixed-Gain AF Relaying for RF-THz Wireless System Over α-κ-μ Shadowed and α-μ Channels

Zafaruddin, S.M. (IEEE, 2022-05)

Recent research investigates the decode-and-forward (DF) relaying for mixed radio frequency (RF) and terahertz (THz) wireless links with zero-boresight pointing errors. We analyze the performance of a fixed-gain ...

GMRES Algorithm for Large-Scale Vectoring in DSL Systems

Zafaruddin, S.M. (IEEE, 2018-08)

We propose an iterative crosstalk cancellation scheme based on the generalized minimal residual (GMRES) algorithm for large-scale digital subscriber line (DSL) systems. The proposed scheme does not require channel inversion ...

Interference Cancellation in Wireless Communications: Past, Present, and Future

Zafaruddin, S.M. (Taylor & Francis, 2022)

The advent of electronic communication has revolutionized the exchange of information with a plethora of services such as military, security, entertainment, and of course, telecommunications. Over the several decades, ...

Iterative receiver based on SAGE algorithm for crosstalk cancellation in upstream vectored VDSL

Zafaruddin, S.M. (ACM Digital Library, 2011-01)

We propose the use of an iterative receiver based on the Space Alternating Generalized Expectation maximization (SAGE) algorithm for crosstalk cancellation in upstream vectored VDSL. In the absence of alien crosstalk, we ...

Krylov algorithms for FEXT cancellation in upstream MIMO VDSL

Zafaruddin, S.M. (IEEE, 2010)

In this paper we show that Krylov subspace techniques are well suited for cancellation of Far End Crosstalk (FEXT) in MIMO Digital Subscriber Lines (DSL). These methods are computationally efficient for large dimensional ...

Large Matrix Asymptotic Analysis of ZF and MMSE Crosstalk Cancelers for Wireline Channels

Zafaruddin, S.M. (ARXIV, 2018-03)

We present asymptotic expressions for user throughput in a multi-user wireline system with a linear decoder, in increasingly large system sizes. This analysis can be seen as a generalization of results obtained for wireless ...

Multiagent Autonomous Learning for Distributed Channel Allocation in Wireless Networks

Zafaruddin, S.M. (IEEE, 2019-07)

In distributed networks such as ad-hoc and device-to-device (D2D) networks, no base station exists and conveying global channel state information (CSI) between users is costly or simply impractical. When the CSI is ...

Multihop Optical Wireless Communication Over F-Turbulence Channels and Generalized Pointing Errors With Fog-Induced Fading

Zafaruddin, S.M.; Chaubey, V.K. (IEEE, 2022-10)

Multihop relaying is a potential technique to mitigate channel impairments in optical wireless communications (OWC). In this paper, multiple fixed-gain amplify-and-forward (AF) relays are employed to enhance the OWC ...

Multihop RIS-Assisted FSO-RF System Over Double Generalized Gamma Fading

Zafaruddin, S.M. (ARXIV, 2021-08)

Reconfigurable intelligent surface (RIS) is a promising technology to avoid signal blockage by creating virtual line-of-sight (LOS) connectivity for free-space optical (FSO) and radio frequency (RF) wireless systems. This ...

Browsing by Author "Zafaruddin, S.M."

Browsing by Author "Zafaruddin, S.M."

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